Emerson Electric O-Z/Gedney Reducing Washer, Type RW, 2 x 1-1/4 in Size, For Use With: IMC/Rigid Conduit, Steel, Pre-Galvanized Zinc Finish, 1.73 in ID x 3 in OD Dimensions
Two reducing washers of the same size are required for each knockoutKnockout closures are used to close unused opening or knockout in sheet metal box, enclosure or cabinet